The DOI matches its Crossref record; 17 of the 17 references it cites were found in a registry or an index.
Carbonation of brine impacted fractionated coal fly ash: Implications for CO2 sequestration
Abstract
Coal combustion by-products such as fly ash (FA), brine and CO(2) from coal fired power plants have the potential to impact negatively on the environment. FA and brine can contaminate the soil, surface and ground water through leaching of toxic elements present in their matrices while CO(2) has been identified as a green house gas that contributes significantly towards the global warming effect. Reaction of CO(2) with FA/brine slurry can potentially provide a viable route for CO(2) sequestration via formation of mineral carbonates. Fractionated FA has varying amounts of CaO which not only increases the brine pH but can also be converted into an environmentally benign calcite. Carbonation efficiency of fractionated and brine impacted FA was investigated in this study. Controlled carbonation reactions were carried out in a reactor set-up to evaluate the effect of fractionation on the carbonation efficiency of FA. Chemical and mineralogical characteristics of fresh and carbonated ash were evaluated using XRF, SEM, and XRD. Brine effluents were characterized using ICP-MS and IC. A factorial experimental approach was employed in testing the variables. The 20-150 μm size fraction was observed to have the highest CO(2) sequestration potential of 71.84 kg of CO(2) per ton of FA while the >150 μm particles had the lowest potential of 36.47 kg of CO(2) per ton of FA. Carbonation using brine resulted in higher degree of calcite formation compared to the ultra-pure water carbonated residues.
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“Besides, the liquid (water)-to-solid (fly ash) ratio can also impact carbonation effect of fly ash in aqueous carbonation [60,68,103,106,109,116].”
From An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry (2022) · cites this paper as [106]
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Sorted by citations
A review of mineral carbonation technologies to sequester CO 2
Sanna, A., Uibu, M., Caramanna, G., Kuusik, R., & Maroto-Valer, M. M. (2014) · Chem. Soc. Rev. · doi:10.1039/c4cs00035h · Cited by 1,258
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Petrovic, B., Gorbounov, M., & Masoudi Soltani, S. (2021) · Microporous and Mesoporous Materials · doi:10.1016/j.micromeso.2020.110751 · Cited by 381
Metadata
- Authors
- Nyambura, M. G., Mugera, G. W., Felicia, P. L., & Gathura, N. P.
- Affiliations
- University of Venda (ZA)
- Venue
- Journal of Environmental Management
- Publisher
- Elsevier BV
- Published
- 2011-03
- Volume
- 92
- Issue
- 3
- Pages
- 655-664
- ISSN
- 0301-4797 (ISSN-L)
- OpenAlex
- W2014615938
- Cited by
- 191
- References
- 17
- Citations by year
- 2026: 15 · 2025: 19 · 2024: 17 · 2023: 10 · 2022: 14 · 2021: 7 · 2020: 12 · 2019: 12 · 2018: 11 · 2017: 9 · 2016: 10 · 2015: 12 · 2014: 14 · 2013: 14 · 2012: 10
- FWCI
- 8.92
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Environmental Management (publishedVersion)
- PubMed (publishedVersion)
- UWC Research Repository (University of the Western Cape) (submittedVersion)
- Funders
- Sasol
- Topics
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Physical Sciences › Environmental Science › Waste Management and Disposal › Waste Management and Environmental Impact
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Coal and Its By-products
- Keywords
- coal fly ash, brine, CO2 sequestration, carbonation, fractionation, calcite formation, CO2 mineralization, particle size, coal combustion by-products, groundwater contamination, leaching, CO2 capture
- MeSH terms
- Calcium Carbonate, Carbon, Carbon Dioxide, Coal, Microscopy, Electron, Scanning, Sodium Chloride, X-Ray Diffraction, Particulate Matter, Coal Ash
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